AU4206897A - Quantum cryptography device and method - Google Patents

Quantum cryptography device and method

Info

Publication number
AU4206897A
AU4206897A AU42068/97A AU4206897A AU4206897A AU 4206897 A AU4206897 A AU 4206897A AU 42068/97 A AU42068/97 A AU 42068/97A AU 4206897 A AU4206897 A AU 4206897A AU 4206897 A AU4206897 A AU 4206897A
Authority
AU
Australia
Prior art keywords
pulses
interferometer
quantum channel
quantum
quantum cryptography
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
AU42068/97A
Inventor
Nicolas Gisin
Bruno Huttner
Antoine Muller
Beat Perny
Hugo Zbinden
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TELECOM PTT
Original Assignee
TELECOM PTT
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=21828329&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=AU4206897(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by TELECOM PTT filed Critical TELECOM PTT
Publication of AU4206897A publication Critical patent/AU4206897A/en
Abandoned legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
    • H04L9/0852—Quantum cryptography

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)
  • Luminescent Compositions (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Holo Graphy (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)

Abstract

A system and method for communicating a key between two stations using an interferometric system for quantum cryptography. The method includes sending at least two light pulses over a quantum channel and detecting the interference created by the light pulses. The interfering pulses traverse the same arms of an interferometer but in a different sequence such that the pulses are delayed when traversing a quantum channel. The pulses are reflected by Faraday mirrors at the ends of the quantum channel so as to cancel any polarization effects. Because the interfering pulses traverse the same arms of an interferometer, there is no need to align or balance between multiple arms of an interferometer.
AU42068/97A 1996-09-05 1997-08-15 Quantum cryptography device and method Abandoned AU4206897A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US2583996P 1996-09-05 1996-09-05
US60025839 1996-09-05
PCT/EP1997/004575 WO1998010560A1 (en) 1996-09-05 1997-08-15 Quantum cryptography device and method

Publications (1)

Publication Number Publication Date
AU4206897A true AU4206897A (en) 1998-03-26

Family

ID=21828329

Family Applications (1)

Application Number Title Priority Date Filing Date
AU42068/97A Abandoned AU4206897A (en) 1996-09-05 1997-08-15 Quantum cryptography device and method

Country Status (11)

Country Link
US (1) US6438234B1 (en)
EP (1) EP0923828B1 (en)
JP (1) JP4095672B2 (en)
AT (1) ATE258733T1 (en)
AU (1) AU4206897A (en)
CA (1) CA2265553C (en)
CZ (1) CZ295335B6 (en)
DE (1) DE69727388T2 (en)
DK (1) DK0923828T3 (en)
ES (1) ES2215238T3 (en)
WO (1) WO1998010560A1 (en)

Families Citing this family (136)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3542699B2 (en) * 1997-05-16 2004-07-14 日本電信電話株式会社 How to configure quantum cryptography
GB9907829D0 (en) * 1999-04-06 1999-06-02 Cit Alcatel Improvements in or relating to optical signal scrambling
KR100327494B1 (en) * 2000-03-24 2002-03-15 윤종용 Key distributing method in secure communication system using multiplexed access manner
JP3841261B2 (en) * 2000-09-11 2006-11-01 三菱電機株式会社 Phase modulation apparatus and phase modulation method
AU2001292061A1 (en) * 2000-10-04 2002-04-15 Nicholas Robert Gisin Method and system for transmission in a noisy environment
FR2816780B1 (en) * 2000-11-10 2003-01-31 Thomson Csf METHOD AND SYSTEM FOR TRANSMISSION BY QUANTUM CRYPTOGRAPHY
FR2816779B1 (en) * 2000-11-10 2003-03-07 Thomson Csf QUANTIC CRYPTOGRAPHY TRANSMISSION METHOD AND SYSTEM
WO2002084337A2 (en) * 2001-04-11 2002-10-24 Magiq Technologies, Inc. Polarization to phase converter
US7184555B2 (en) 2001-04-11 2007-02-27 Magiq Technologies, Inc. Quantum computation
US7113967B2 (en) 2001-05-29 2006-09-26 Magiq Technologies, Inc Efficient quantum computing operations
JP4763166B2 (en) * 2001-07-25 2011-08-31 三菱電機株式会社 Optical signal transmission device and optical signal transmission method for optical signal transmission device
US7580524B2 (en) * 2002-03-11 2009-08-25 Universite De Geneve Method and apparatus for synchronizing the emitter and the receiver in an autocompensating quantum cryptography system
US7403623B2 (en) * 2002-07-05 2008-07-22 Universite Libre De Bruxelles High-rate quantum key distribution scheme relying on continuously phase and amplitude-modulated coherent light pulses
US20060222180A1 (en) * 2002-10-15 2006-10-05 Elliott Brig B Chip-scale transmitter for quantum cryptography
US7627126B1 (en) * 2002-10-15 2009-12-01 Bbn Technologies Corp. Systems and methods for implementing path length control for quantum cryptographic systems
JP4173422B2 (en) * 2002-12-04 2008-10-29 日本電信電話株式会社 Quantum key distribution method and quantum key distribution system
US7227955B2 (en) * 2003-02-07 2007-06-05 Magiq Technologies, Inc. Single-photon watch dog detector for folded quantum key distribution system
US20060018475A1 (en) * 2003-02-07 2006-01-26 Magiq Technologies, Inc. Kd systems with robust timing
DE602004012034D1 (en) * 2003-02-07 2008-04-10 Magiq Technologies Inc MONITORING FACTOR FOR A QKD SYSTEM
GB2399220B (en) * 2003-03-06 2005-07-13 Toshiba Res Europ Ltd Photonic quantum information system using unpolarised light
US7706535B1 (en) 2003-03-21 2010-04-27 Bbn Technologies Corp. Systems and methods for implementing routing protocols and algorithms for quantum cryptographic key transport
US7113598B2 (en) * 2003-05-14 2006-09-26 Science Research Laboratory, Inc. Methods and systems for high-data-rate quantum cryptography
US7315630B2 (en) 2003-06-26 2008-01-01 Fotonation Vision Limited Perfecting of digital image rendering parameters within rendering devices using face detection
US7792970B2 (en) 2005-06-17 2010-09-07 Fotonation Vision Limited Method for establishing a paired connection between media devices
US8593542B2 (en) 2005-12-27 2013-11-26 DigitalOptics Corporation Europe Limited Foreground/background separation using reference images
US7440593B1 (en) 2003-06-26 2008-10-21 Fotonation Vision Limited Method of improving orientation and color balance of digital images using face detection information
US8494286B2 (en) 2008-02-05 2013-07-23 DigitalOptics Corporation Europe Limited Face detection in mid-shot digital images
US7269292B2 (en) 2003-06-26 2007-09-11 Fotonation Vision Limited Digital image adjustable compression and resolution using face detection information
US7565030B2 (en) 2003-06-26 2009-07-21 Fotonation Vision Limited Detecting orientation of digital images using face detection information
US7471846B2 (en) 2003-06-26 2008-12-30 Fotonation Vision Limited Perfecting the effect of flash within an image acquisition devices using face detection
US8896725B2 (en) 2007-06-21 2014-11-25 Fotonation Limited Image capture device with contemporaneous reference image capture mechanism
US9129381B2 (en) 2003-06-26 2015-09-08 Fotonation Limited Modification of post-viewing parameters for digital images using image region or feature information
US9692964B2 (en) 2003-06-26 2017-06-27 Fotonation Limited Modification of post-viewing parameters for digital images using image region or feature information
US8155397B2 (en) 2007-09-26 2012-04-10 DigitalOptics Corporation Europe Limited Face tracking in a camera processor
US8948468B2 (en) 2003-06-26 2015-02-03 Fotonation Limited Modification of viewing parameters for digital images using face detection information
US7574016B2 (en) 2003-06-26 2009-08-11 Fotonation Vision Limited Digital image processing using face detection information
US8989453B2 (en) 2003-06-26 2015-03-24 Fotonation Limited Digital image processing using face detection information
US7844076B2 (en) 2003-06-26 2010-11-30 Fotonation Vision Limited Digital image processing using face detection and skin tone information
US8682097B2 (en) 2006-02-14 2014-03-25 DigitalOptics Corporation Europe Limited Digital image enhancement with reference images
US8498452B2 (en) 2003-06-26 2013-07-30 DigitalOptics Corporation Europe Limited Digital image processing using face detection information
US8330831B2 (en) 2003-08-05 2012-12-11 DigitalOptics Corporation Europe Limited Method of gathering visual meta data using a reference image
US7620218B2 (en) 2006-08-11 2009-11-17 Fotonation Ireland Limited Real-time face tracking with reference images
GB2404103B (en) * 2003-07-15 2005-06-29 Toshiba Res Europ Ltd A quantum communication system
JP4632652B2 (en) 2003-10-10 2011-02-16 日本電気株式会社 Quantum cryptographic key distribution system and synchronization method used therefor
WO2005043787A1 (en) * 2003-10-29 2005-05-12 Qucor Pty Ltd Components for optical qubits in the radio frequency basis
US20050095003A1 (en) * 2003-10-30 2005-05-05 Huberman Bernardo A. Quantum approach for coordinating activities
US7409162B2 (en) * 2003-10-30 2008-08-05 Magiq Technologies, Inc Timing error reduction in QKD systems
US7242775B2 (en) * 2003-11-12 2007-07-10 Magiq Technologies, Inc. Optical pulse calibration for quantum key distribution
WO2005053219A1 (en) 2003-11-28 2005-06-09 Japan Science And Technology Agency Communication system and communication method using the same
US7606371B2 (en) * 2003-12-22 2009-10-20 Magiq Technologies, Inc. Two-way QKD system with active compensation
JP4200909B2 (en) * 2004-01-29 2008-12-24 日本電気株式会社 Random number generation and sharing system, encrypted communication device, and random number generation and sharing method used therefor
CN1651947A (en) * 2004-02-02 2005-08-10 中国科学技术大学 Polarization control coding method coder and quantum key distributing system
CN101571612B (en) * 2004-02-02 2012-12-26 中国科学技术大学 Polarization controlling encoder
US20050190922A1 (en) * 2004-02-28 2005-09-01 Lagasse Michael J. Secure use of a single single-photon detector in a QKD system
US7221812B2 (en) * 2004-02-28 2007-05-22 Magiq Technologies, Inc. Compact optics assembly for a QKD station
US7697693B1 (en) 2004-03-09 2010-04-13 Bbn Technologies Corp. Quantum cryptography with multi-party randomness
US7606367B2 (en) * 2004-03-09 2009-10-20 Universrité de Geneve Quantum cryptography with fewer random numbers
JP2005286485A (en) * 2004-03-29 2005-10-13 Sony Corp Quantum encryption communication method and quantum encryption communication apparatus
JP4532484B2 (en) * 2004-05-17 2010-08-25 三菱電機株式会社 Quantum cryptographic communication device
US7747023B2 (en) 2004-05-25 2010-06-29 Felix Bussieres Multi-user quantum cryptography method and system using wavelength division multiplexing
US20060018476A1 (en) * 2004-06-23 2006-01-26 Nickel George H Key path generation and exchange of cryptographic keys using path length noise
US20060023885A1 (en) * 2004-07-28 2006-02-02 Alexei Trifonov Two-way QKD system with backscattering suppression
US20060029229A1 (en) * 2004-08-03 2006-02-09 Alexei Trifonov QKD station with EMI signature suppression
EP1787420A2 (en) * 2004-09-07 2007-05-23 MagiQ Technologies, Inc. Systems and methods for multiplexing qkd channels
US7920704B2 (en) * 2004-10-09 2011-04-05 The United States Of America As Represented By The Secretary Of The Army Systems and methods for obtaining information on a key in BB84 protocol of quantum key distribution
US8320641B2 (en) 2004-10-28 2012-11-27 DigitalOptics Corporation Europe Limited Method and apparatus for red-eye detection using preview or other reference images
US7437081B2 (en) * 2004-11-01 2008-10-14 Magiq Technologies, Inc System and method for providing two-way communication of quantum signals, timing signals, and public data
JP2006166162A (en) * 2004-12-09 2006-06-22 Nec Corp Communication system provided with pulse waveform shaping function and communication method
US8503800B2 (en) 2007-03-05 2013-08-06 DigitalOptics Corporation Europe Limited Illumination detection using classifier chains
US7315631B1 (en) 2006-08-11 2008-01-01 Fotonation Vision Limited Real-time face tracking in a digital image acquisition device
JP4504833B2 (en) * 2005-02-17 2010-07-14 富士通株式会社 Private key distribution system
US7436961B2 (en) * 2005-03-08 2008-10-14 Magiq Technologies, Inc. Sentinel synchronization method for enhancing QKD security
US8098826B2 (en) * 2005-04-20 2012-01-17 Magiq Technologies, Inc. QKD system laser autocalibration based on bit-error rate
US7853011B2 (en) * 2005-05-13 2010-12-14 Ciena Corporation Methods and apparatus for monitoring the integrity of a quantum channel supporting multi-quanta pulse transmission
US20060263096A1 (en) * 2005-05-17 2006-11-23 Mihaela Dinu Multi-channel transmission of quantum information
US7706536B2 (en) * 2005-05-17 2010-04-27 Alcatel-Lucent Usa Inc. Phase locking in a multi-channel quantum communication system
GB2430123B (en) * 2005-09-09 2008-01-23 Toshiba Res Europ Ltd A quantum communication system
US20070071244A1 (en) * 2005-09-27 2007-03-29 Magiq Technologies, Inc. QKD station with efficient decoy state capability
US7747019B2 (en) 2005-09-28 2010-06-29 Nortel Networks Limited Methods and systems for communicating over a quantum channel
WO2007041096A2 (en) * 2005-09-29 2007-04-12 Magiq Technologies, Inc. Two-way qkd system with faraday effect compensation
US20070076878A1 (en) * 2005-09-30 2007-04-05 Nortel Networks Limited Any-point-to-any-point ("AP2AP") quantum key distribution protocol for optical ring network
US20070076887A1 (en) 2005-09-30 2007-04-05 Nortel Networks Limited Double phase encoding quantum key distribution
US7728985B2 (en) * 2005-11-14 2010-06-01 Imalux Corporation Polarization-sensitive common path optical coherence reflectometry/tomography device
US7254295B2 (en) * 2005-11-21 2007-08-07 Magiq Technologies, Inc. Optical fiber interferometer with relaxed loop tolerance and QKD system using the same
US20070130455A1 (en) * 2005-12-06 2007-06-07 Elliott Brig B Series encryption in a quantum cryptographic system
KR100759811B1 (en) * 2005-12-08 2007-09-20 한국전자통신연구원 Transciver and method for high-speed auto-compensating quantum cryptography
US20070133798A1 (en) * 2005-12-14 2007-06-14 Elliott Brig B Quantum cryptography on a multi-drop optical network
US8082443B2 (en) * 2006-01-09 2011-12-20 Bbnt Solutions Llc. Pedigrees for quantum cryptography
CN101401350A (en) * 2006-03-16 2009-04-01 日本电气株式会社 Quantum cryptography device
JP5146681B2 (en) * 2006-03-16 2013-02-20 日本電気株式会社 Quantum cryptography transmission system and optical circuit
JP2007251678A (en) * 2006-03-16 2007-09-27 Sony Corp Quantum encryption communication apparatus and average photon number setting method in communication terminal
JP2007274300A (en) * 2006-03-31 2007-10-18 Hitachi Information & Communication Engineering Ltd Synchronization processing method in common key cipher communication
JP5196093B2 (en) * 2006-04-20 2013-05-15 日本電気株式会社 Optical communication apparatus and quantum cryptography key distribution system using the same
EP2033142B1 (en) 2006-06-12 2011-01-26 Tessera Technologies Ireland Limited Advances in extending the aam techniques from grayscale to color images
US7583803B2 (en) * 2006-07-28 2009-09-01 Magiq Technologies, Inc. QKD stations with fast optical switches and QKD systems using same
US7403643B2 (en) 2006-08-11 2008-07-22 Fotonation Vision Limited Real-time face tracking in a digital image acquisition device
US7916897B2 (en) 2006-08-11 2011-03-29 Tessera Technologies Ireland Limited Face tracking for controlling imaging parameters
KR100890389B1 (en) * 2006-12-05 2009-03-26 한국전자통신연구원 Polarization-insensitive one way quantum key receiver, transmitter/receiver system
JP4134271B1 (en) * 2007-01-18 2008-08-20 三菱電機株式会社 Quantum cryptography receiver, quantum cryptography transmitter, and optical pulse phase modulation method
US8055067B2 (en) 2007-01-18 2011-11-08 DigitalOptics Corporation Europe Limited Color segmentation
JP4838166B2 (en) 2007-02-19 2011-12-14 ソニー株式会社 Quantum cryptographic communication device and communication terminal
DE602008001607D1 (en) 2007-02-28 2010-08-05 Fotonation Vision Ltd SEPARATION OF DIRECTIONAL ILLUMINATION VARIABILITY IN STATISTICAL FACE MODELING BASED ON TEXTURE SPACE MODULES
US8649604B2 (en) 2007-03-05 2014-02-11 DigitalOptics Corporation Europe Limited Face searching and detection in a digital image acquisition device
US7876901B2 (en) * 2007-03-29 2011-01-25 The United States Of America As Represented By The Secretary Of The Army Alternative design for quantum cryptographic entangling probe
WO2008140291A2 (en) * 2007-05-11 2008-11-20 Mimos Berhad Deterministic rendering for practical quantum cryptography
US7916971B2 (en) 2007-05-24 2011-03-29 Tessera Technologies Ireland Limited Image processing method and apparatus
JP4728288B2 (en) * 2007-06-15 2011-07-20 三菱電機株式会社 Quantum cryptography receiver, quantum cryptography system, and quantum cryptography transmission / reception method
US8718485B2 (en) 2007-07-13 2014-05-06 Nec Corporation Quantum key distribution system, optical transmitter, optical modulation control circuit, and optical modulation control method
US7853020B2 (en) * 2007-09-19 2010-12-14 Mogiq Technologies, Inc. Systems and methods for enhanced quantum key formation using an actively compensated QKD system
US7855737B2 (en) 2008-03-26 2010-12-21 Fotonation Ireland Limited Method of making a digital camera image of a scene including the camera user
KR100983008B1 (en) * 2008-05-30 2010-09-20 한국전자통신연구원 System And Method For Quantum Cryptograpy
JP5547730B2 (en) 2008-07-30 2014-07-16 デジタルオプティックス・コーポレイション・ヨーロッパ・リミテッド Automatic facial and skin beautification using face detection
JP4879294B2 (en) * 2009-04-14 2012-02-22 日本電信電話株式会社 Quantum cryptographic communication data processing method and quantum cryptographic communication device
US8379917B2 (en) 2009-10-02 2013-02-19 DigitalOptics Corporation Europe Limited Face recognition performance using additional image features
US8433070B2 (en) 2010-05-17 2013-04-30 Raytheon Bbn Technologies Corp. Systems and methods for stabilization of interferometers for quantum key distribution
GB2491896A (en) 2011-06-17 2012-12-19 Univ Bruxelles Secret key generation
EP2709295A1 (en) * 2012-09-14 2014-03-19 Alcatel Lucent Visualisation of an optical signal by linear optical sampling
CN104215328A (en) * 2014-09-24 2014-12-17 安徽问天量子科技股份有限公司 Hard light induced blindness monitoring device and method of single-photon detector
GB2536248B (en) * 2015-03-10 2021-10-20 Univ Bristol Optical apparatus
KR101664173B1 (en) 2015-06-08 2016-10-11 한국과학기술연구원 Apparatus and method for stablizing quantum cryptography system
US10205592B2 (en) * 2015-10-12 2019-02-12 Nec Corporation Physical layer key distribution for long distance repeated networks using random environmental instability
RU2622985C1 (en) * 2015-12-09 2017-06-21 Федеральное государственное бюджетное учреждение науки Институт физики твердого тела Российской академии наук (ИФТТ РАН) Device of quantum cryptography (versions)
US10110369B2 (en) 2016-05-02 2018-10-23 Ut-Battelle, Llc Quantum-authenticated clock signal
RU2671620C1 (en) * 2016-12-29 2018-11-02 Общество с ограниченной ответственностью "Международный центр квантовой оптики и квантовых технологий" (ООО "МЦКТ") High-speed autocompensation scheme of quantum key distribution
US10680807B2 (en) 2017-05-30 2020-06-09 Ut-Battelle Llc Quantum self-authenticating timing system
US11343087B1 (en) 2018-03-09 2022-05-24 Wells Fargo Bank, N.A. Systems and methods for server-side quantum session authentication
US11025416B1 (en) * 2018-03-09 2021-06-01 Wells Fargo Bank, N.A. Systems and methods for quantum session authentication
US10728029B1 (en) 2018-03-09 2020-07-28 Wells Fargo Bank, N.A. Systems and methods for multi-server quantum session authentication
CN108446099B (en) * 2018-05-02 2024-05-14 如般量子科技有限公司 Source-independent high-dimensional time-coded quantum random number generator
CN108540282A (en) * 2018-05-02 2018-09-14 如般量子科技有限公司 HD-QKD systems based on Polarization Modulation time encoding
RU2691829C1 (en) * 2018-05-31 2019-06-18 Андрей Николаевич Климов Quantum cryptography device
US10855453B1 (en) 2018-08-20 2020-12-01 Wells Fargo Bank, N.A. Systems and methods for time-bin quantum session authentication
CN111555863B (en) * 2019-02-12 2022-04-29 科大国盾量子技术股份有限公司 Sending end, encoding method and quantum key distribution system for time phase-polarization combined encoding
US20220231845A1 (en) * 2019-06-17 2022-07-21 Kt Corporation Quantum key distribution method, device, and system
EP3798643B1 (en) * 2019-09-25 2024-05-01 Lumiker Aplicaciones Tecnologicas S.L. Optical fiber-based current measuring equipment for measuring the current circulating through a conductor and associated method
US11789043B2 (en) 2019-09-25 2023-10-17 Lumiker Aplicaciones Tecnológicas S.L. Method and apparatus for measuring the current circulating through a conductor

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2152628C (en) * 1992-12-24 1999-02-02 Paul David Townsend System and method for key distribution using quantum cryptography
US5307410A (en) * 1993-05-25 1994-04-26 International Business Machines Corporation Interferometric quantum cryptographic key distribution system
AU678848B2 (en) * 1993-09-09 1997-06-12 British Telecommunications Public Limited Company Key distribution in a multiple access network using quantum cryptography
US5757912A (en) * 1993-09-09 1998-05-26 British Telecommunications Public Limited Company System and method for quantum cryptography
US5515438A (en) * 1993-11-24 1996-05-07 International Business Machines Corporation Quantum key distribution using non-orthogonal macroscopic signals
WO1996007951A1 (en) 1994-09-08 1996-03-14 British Telecommunications Plc Polarisation modulation
US5953421A (en) * 1995-08-16 1999-09-14 British Telecommunications Public Limited Company Quantum cryptography
US6188768B1 (en) * 1998-03-31 2001-02-13 International Business Machines Corporation Autocompensating quantum cryptographic key distribution system based on polarization splitting of light

Also Published As

Publication number Publication date
DE69727388T2 (en) 2004-11-25
US6438234B1 (en) 2002-08-20
EP0923828B1 (en) 2004-01-28
DK0923828T3 (en) 2004-05-24
CA2265553C (en) 2007-03-13
CZ47799A3 (en) 1999-08-11
ATE258733T1 (en) 2004-02-15
ES2215238T3 (en) 2004-10-01
CA2265553A1 (en) 1998-03-12
DE69727388D1 (en) 2004-03-04
WO1998010560A1 (en) 1998-03-12
JP2000517499A (en) 2000-12-26
EP0923828A1 (en) 1999-06-23
JP4095672B2 (en) 2008-06-04
CZ295335B6 (en) 2005-07-13

Similar Documents

Publication Publication Date Title
AU4206897A (en) Quantum cryptography device and method
Jopson et al. Measurement of second-order polarization-mode dispersion vectors in optical fibers
CA2121367C (en) Sagnac interferometer based secure communication system
US7667849B2 (en) Optical sensor with interferometer for sensing external physical disturbance of optical communications link
CA2254767A1 (en) Method and apparatus for polarisation-insensitive quantum cryptography
CA2124124A1 (en) Ultra-high capacity non-soliton optical transmission using optical phaseconjugation
AU3589993A (en) Interferometric, self-homodyne optical receiver and method and optical transmission system incorporating same
CA2169746A1 (en) Method for Key Distribution Using Quantum Cryptography
AU644049B2 (en) Protection arrangement for an optical transmitter/receiver device
EP1668802A1 (en) Secure optical communication
AU3392995A (en) Security device
AU3830593A (en) Optical communication system with monitoring device for avoiding giant pulses
AU4724589A (en) Broadband optical communication system
CA2338189A1 (en) Method and apparatus for data communication
CN208369599U (en) Phase decoding reception device and quantum key distribution system
AU3973093A (en) Optical coherence domain reflectometer
CA2160759A1 (en) Aircraft piloting optoelectronic aid device
CA2193424A1 (en) Dispersion tapered optical fibers for use in wdm soliton transmission systems
AU4891693A (en) An optical receiver with dividing network
CA2141560A1 (en) Method and circuit arrangement for electric compensation of signal distortion caused by laser chirp and fiber dispersion
CA2214543A1 (en) Method and device for measuring the distance between two stations connected by a communications channel
JPS57162542A (en) Optical signal transmitting system
Tsubokawa et al. Waveform degradation due to dispersion effects in an optical CPFSK system
AU5367790A (en) Fault detecting system for duplexing type local area networks
Lam et al. Experimental demonstration of spectrally encoded optical CDMA systems using Mach-Zehnder encoder chains